how many calories of heat would be required to raise the temperature of a 45 kg. person by 2degree celsius?

Answer 1

90,000 calories would be required to raise the temperature of 45 kg. of water by 2 degrees Celsius, but since the human body is only about 70 percent water and there are a lot of other variables such as the hypothalamus gland in particular and the autonomic nervous system in general that you'd have to override, there'd be no way to accurately measure the heat requirements. The amount of heat would also depend on one's bodily makeup, whether they were endomorphic, ectomorphic or mesomorphic. Muscle tissue is much denser than fat, and (correct me if I'm wrong) would conduct heat better than fat, although fat would be a better insulator. Bottom line, there are a lot of variables and there's probably no way to accurately calculate the heat requirement unless a person's body is 100 percent water. And if you apply heat to a snowman, they melt pretty quickly. :-)